Groundworks

mudjacking contractor, well, basement waterproofer,

This pro has maintained an average of 4.5+ stars throughout their time with Angi.

About us

Groundworks specializes in helping homeowners with their residential and commercial foundation repair, basement waterproofing and wall repair, and concrete repair needs. Our top priority is providing high-quality home repair solutions and personalized service across the Seattle area. With fully trained technicians, industry-leading products, and nationally backed warranties, Groundworks is here to restore your foundation.

Business highlights

30 years of trusted experience
Se Habla Español

Amenities

Free Estimates
Yes
Warranties
Yes


Accepted payment methods

CreditCard

Reviews

4.676 Reviews
Number of StarsImage of DistributionNumber of Ratings
5
75%
4
18%
3
1%
2
3%
1
3%


Rating CategoryRating out of 5
quality
4.6
value
4.6
responsiveness
4.7
Showing 1-25 of 76 reviews

Ho G.
04/2025
5.0
I just had the BEST experience with Groundworks, working with Brian Eames, and the crew of Alex, Iuri and Luis. My project was a big project consisting of installation of approximately 40 pier piles, pin piles and helical piles to my foundation, in order to better anchor my home to the bedrock (I live on a hill). I was EXTREMELY nervous about the project and planned for it for a year and a half. Brian consistently calmed my fears every step of the way, and each time I had a question, he took as much time as needed to give me all the answers and reassure me. When my project finally occurred last week, I was immediately comforted by the presence of the crew - Alex, Iuri and Luis. They were professional, respectful, kind, and explained everything in detail before they started on the project to alleviate any concerns I had. When the project was complete, the clean up was amazing, They put everything back together perfectly, and it was as if they had never been here. I now have t
Rating CategoryRating out of 5

Deanna R.
03/2025
5.0
Gardner came to do an inspection of my basement and provide a quote. I had received other quotes that only provided for a single sump pump install at outrageous prices. He was very thorough, took two hours to measure, inspect, provided videos and explanations on everything, and the quote was shockingly affordable with so much more work I was ecstatic! I am getting a three sump pump with back up battery, and so much more for basically what the others quoted. And, to have the option to finance through Greensky was the cherry on top! If you are in King County, ask for Gardner @ GROUNDWORKS - you won’t regret it!
Rating CategoryRating out of 5
$25,000

Fran f.
03/2025
2.0
Groundworks were contracted to encapsulate the crawl space, with a dehumidifier, intellijacks & sump pump. The inspector showed us pictures & videos of what the work would look like on completion, & explained how each solution would be installed. They tried to charge me more for vent covers until I showed them the contract covering this part. The foreman told me there was a reset button for the sump pump to be installed on an exterior wall, but they did not install it, instead said they would put in a service order. I haven?t heard anything about this issue yet. When they installed the moister barrier, they excluded the cement pads I was told it cost extra to have them covered. When I signed the contract, I was never told there would be extra charges for vent covers or cement pads to be covered. The contract I signed covered a complete encapsulation, but this is not what I got. This is a bait & switch. I would not recommend Groundworks.
Rating CategoryRating out of 5
$5,100,000

Marianne H.
01/2025
1.0
Small post pier job. Told the two different estimators I?d like it level as possible with no further sinking. Two low spots the put in two beams. Around 340 sq feet. When finished the supervisor came in and I pointed out a small divot in .one area and a larger in the other. His response was to do this right you need a half a beam here and another there. I said no one had told me this! I called office Dec 11 talked to manager who offered to fix this for cost of materials. I said I paid you a lot of money and didn?t get it done right. He offered to lower a beam to fix the new divot in floor. Not a word from them to this date. No one ever said I would not be happy if they didn?t put in another beam and a half, nor this might make divots in other areas. They certainly didn?t say to do the job correctly you need to do xyz. I spent over 16,000 and did not get what I paid for. I?d say there was a huge misinformation problem, on the company end.
Rating CategoryRating out of 5
$1,610,631

PLATONOV M.
09/2024
5.0
Fast and good service!

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$1,700

Vivian Q.
09/2024
5.0
Stellar service and repair to our retaining wall. From Richard, who did the site visit and bid, to their fantastic crew Sam, Ivan, and Serghie, their communication and quality of work was sensational. We obtained three bids for the job and Groundworks was the best. I usually don't go with the lowest bid, but my research aligned with what Richard recommended. The finished job exceeded my expectations. Our wall was able to be put into alignment with the rest of the wall, and the cracks at either end repaired and fortified. I highly recommend Groundworks

Rating CategoryRating out of 5
quality
5.0
value
5.0
responsiveness
5.0

Yes, I recommend this pro

Scott C.
09/2024
5.0
Matvey did an outstanding job of keeping through the reporting, permitting and construction work - absolutely fantastic. Couldn't be happier with the quality of their work.

Rating CategoryRating out of 5
quality
5.0
value
5.0
responsiveness
5.0

Yes, I recommend this pro

happy l.
09/2024
4.0
â Brian (field inspector), David / Tripp / Kender (installers) were a pleasure to work with, despite some of the scheduling challenges. They were very respectful of our property and excellent communicators who, as far as I can tell, performed the job correctly. We'll know for certain when that next "atmospheric river" arrives. ;)

Rating CategoryRating out of 5
quality
4.5
value
4.0
responsiveness
4.0

Yes, I recommend this pro

Lisa E.
09/2024
5.0
Matvey, A Groundworks Company installed a beautiful coating my n c garage! Mark & Roman were on time, professional, knowledgeable and provided excellent service! We appreciate their time & expertise!

Rating CategoryRating out of 5
quality
5.0
value
5.0
responsiveness
5.0

Yes, I recommend this pro

Joseph S.
08/2024
5.0
Matthew Somerville was great to work with. He was informative and very helpful. I would recommend Matvey Foundation Repair and especially Matthew S that came out.

Rating CategoryRating out of 5
quality
5.0
value
5.0
responsiveness
5.0

Yes, I recommend this pro

Deb F.
08/2024
5.0
Matthew S came, surveyed the problem, and spent time making sure he understood what I needed. He then proposed a plan and made sure I understood all my options. He was kind, patient, and very professional.

Rating CategoryRating out of 5
quality
5.0
value
5.0
responsiveness
5.0

Yes, I recommend this pro

John S.
08/2024
5.0
Everything went as planned. The came on time, cleaned up afterward, and even patched a crack that wasn’t part of the original contract. Didn’t even ask them; they offered. Super happy with the result. I’d hire them again.

Rating CategoryRating out of 5
quality
5.0
value
5.0
responsiveness
5.0

Yes, I recommend this pro

Valerie J.
04/2024
5.0
A beautiful job, and a wonderful addition to my home. From beginning to end, Matvy was extremely professional and I am very pleased.

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro

Yoomi L.
04/2023
5.0
They are very professiinal at what they are doing. From the estimate to the actual service, they were organized and provided enough explanation. I was very satisfied with their work on my porch concrete.

Rating CategoryRating out of 5
quality
5.0
value
5.0
responsiveness
4.0

Yes, I recommend this pro

Chris F.
01/2023
3.0
Nothing to say

Rating CategoryRating out of 5
quality
3.0
value
3.0
responsiveness
3.0


ANA L.
08/2022
5.0
Great svc

Rating CategoryRating out of 5
quality
5.0
value
5.0
responsiveness
5.0

Yes, I recommend this pro

Reginald S.
06/2022
5.0
Great job. Guys..I'll recommend them to my friends

Rating CategoryRating out of 5
quality
4.5
value
5.0
responsiveness
5.0

Yes, I recommend this pro
$750

Jan S.
05/2022
5.0
Excellent service Showed us what they were doing all along Greatest technology and warranty

Rating CategoryRating out of 5
quality
5.0
value
5.0
responsiveness
5.0

Yes, I recommend this pro

Jeffrey M.
02/2022
4.0
Showed up on time did thourgh inspection

Rating CategoryRating out of 5
quality
3.5
value
3.5
responsiveness
5.0

Yes, I recommend this pro

David R.
01/2022
4.5
Didn’t complete everything on the list but gave me credit for what was missed. Easy to work with

Rating CategoryRating out of 5
quality
4.5
value
4.5
responsiveness
4.5

Yes, I recommend this pro

Bart G.
08/2021
5.0
They made my cracked driveway look like new. With the stabilizing they did, itâ ll last another 100 years! Very happy with my basement also!

Rating CategoryRating out of 5
quality
5.0
value
5.0
responsiveness
5.0

Yes, I recommend this pro
$2,300

Jon W.
07/2021
5.0
Did what they said they would do.

Rating CategoryRating out of 5
quality
5.0
value
5.0
responsiveness
5.0

Yes, I recommend this pro

Julie P.
03/2021
4.0
Very happy with work.

Rating CategoryRating out of 5
quality
4.0
value
4.0
responsiveness
4.0

Yes, I recommend this pro

Keith m.
06/2020
4.0
I think they have a corner of the market for many good reasons.

Rating CategoryRating out of 5
quality
4.0
value
4.5
responsiveness
5.0

Yes, I recommend this pro

SCOTT S.
07/2019
5.0
Solid professional treatment from bid to finish. Excellent warranty. I learned much about my property and the causes of the compaction.

Rating CategoryRating out of 5
quality
5.0
value
4.0
responsiveness
5.0

Yes, I recommend this pro
$4,800

Contact information

18915 16th Ave S, SeaTac, WA 98188

https://www.groundworks.com/

Service hours

Monday:
4:00 AM - 8:00 PM
Tuesday:
4:00 AM - 8:00 PM
Wednesday:
4:00 AM - 8:00 PM
Thursday:
4:00 AM - 8:00 PM
Friday:
4:00 AM - 8:00 PM
Saturday:
5:00 AM - 8:00 PM
Sunday:
7:00 AM - 8:00 PM

Licensing

Licensed*

Trade License Number
MATVECI991CB
Trade License Locale
WA
Trade License Expiration
10/04/2025
State Contractor License Requirements

All statements concerning insurance, licenses, and bonds are informational only, and are self-reported. Since insurance, licenses and bonds can expire and can be cancelled, homeowners should always check such information for themselves. To find more licensing information for your state, visit our State Contractor License Requirements page.

*Contact business to see additional licenses.


Service Categories

mudjacking contractor,
well,
basement waterproofer,
concrete repair contractor,
foundation repair contractor,
plumber

FAQ

Monday: 4:00 AM - 8:00 PM

Tuesday: 4:00 AM - 8:00 PM

Wednesday: 4:00 AM - 8:00 PM

Thursday: 4:00 AM - 8:00 PM

Friday: 4:00 AM - 8:00 PM

Saturday: 5:00 AM - 8:00 PM

Sunday: 7:00 AM - 8:00 PM

Groundworks accepts the following forms of payment: CreditCard
Yes, Groundworks offers free project estimates.
No, Groundworks does not offer eco-friendly accreditations.
No, Groundworks does not offer a senior discount.
No, Groundworks does not offer emergency services.
Yes, Groundworks offers warranties.

Contact information

18915 16th Ave S, SeaTac, WA 98188

https://www.groundworks.com/

Service hours

Monday:
4:00 AM - 8:00 PM
Tuesday:
4:00 AM - 8:00 PM
Wednesday:
4:00 AM - 8:00 PM
Thursday:
4:00 AM - 8:00 PM
Friday:
4:00 AM - 8:00 PM
Saturday:
5:00 AM - 8:00 PM
Sunday:
7:00 AM - 8:00 PM